<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="/js/vue.js"></script>
</head>
<body>
    <div id="app">
        <input type="text" v-model="msg">
        <!-- 使用过滤器 -->
        {{msg\upperCase\asterisk}}
    </div>
    <div id="app2">
        <input type="text" v-model="msg">
        {{msg\upperCase\asterisk}}
    </div>
    <script>
        var app = new Vue({
            el:'#app',
            data:{
                msg:''
            },
            filter:{
                upperCase:function(val){
                    return val.toUpperCase();
                },
                asterisk:function(val){
                    var reg = d/g;
                    return val.replace(reg,'*');
                }
            }
        });
        var app2 = new Vue({
            el:'#app2',
            data:{
                msg:''
            }
        })
    </script>
</body>
</html>